"The ReactOS project is proud to announce the release of version 0.3.15. A culmination of over a year of development, 0.3.15 incorporates several architectural enhancements to create a more compatible and conformant implementation of the NT architecture. Perhaps the most user visible enhancement is initial support for USB devices, both storage and input. Infrastructure wise, this is the first release of ReactOS using CMake instead of rbuild. The conversion to CMake has allowed developers to generate Visual Studio solutions for working on the code, though several C++ components still need work before support for Microsoft's toolchain is complete."

While ReactOS is a promising project especially for open source windows apps in my opinion it has some drawbacks

1. (User Space of things) It tries to implement things that already have alternatives instead of reusing as much code as possible.
2. It states that it has no intention to accelerate cygwin. For me its a bad decision.
3. It aims at binary compatibility with Windows instead of source compatibility which means it reproduces many windows specific flaws.
4. It insists on Fat while JFS is an attractive option
5. It could co-operate with OS2 crowd to get OS2 functionality / source compatibility BY them
6. It could optionally investigate the use of a uKernel like the OsFree project